Optional Serial Interface (Localtalk/Serial Module) - Epson EPL-N1200 Service Manual

General Description

1.3.2 Optional Serial Interface (LocalTalk/Serial Module)

The optional LocalTalk/Serial module contains serial interface with the following characteristics.
Type: RS-232C or current loop
Transfer system: Full duplex
Synchronization: Asynchronous start-stop system
Protocol: X-ON/X-OFF (can be combined with DTR control)
DTR control (can be combined with X-ON/X-OFF)
Transfer speed: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, or 57600 BPS
Note 1: For RS-232C signal level, speeds of 38400 BPS and above place restrictions on the host
computer, cable, and other operating conditions.
Note 2 For current loop signal level, speeds of 2400 BPS and above place restrictions on the
host computer, cable, and other operationg conditions.
Error: Overrun error:
Parity error:
Framing error:
Breaking character:
Applicable plug Circular miniature DIN 8-pin plug
Signal Level TXD, DTR
(EIA BASED) :
Out put Voltage
Open circuit voltage
Impedance with power off (rO)
Load capacitance
Through rate
Load resistance
RXD, CTS
Input Voltage
Input signal range
Input impedance
Imput current
Open-circuit input voltage
Note : Annotations "MIN". and "MAX." apply to absolute values.
Signal descriptions: See Table 1-10.
1-18
Start-bit: 1 bit
Stop-bit: 1 or 2 bits
Data length: 7 bits or 8 bits
Parity: Odd, even, or none
Processed as missing data and replaced by "*"
Replaced by "*"
Replaced by "*"
Ignored
EPL-N1200 Service Manual
(VOH) 5 to 15 V
(VOL) -5 to -15 V
(VO) within +15 V
300 ohms (MIN.)
(CL) 2500 pF (MAX.)
30 V/u SEC (MAX.)
(Lo) 3 K to 7 K ohms
(VIH) 3 V (MIN.)
(VIL) -5 V (MIN.)*1)
+25 V (MAX.)*1)
(RI) 3 K to 7 K ohms
(II) + 8 mA (MAX)*1)
(EL) -2 V (MAX>)*1)
Rev. A